×

Endoprosthesis device and method

  • US 4,892,550 A
  • Filed: 12/30/1985
  • Issued: 01/09/1990
  • Est. Priority Date: 12/30/1985
  • Status: Expired due to Fees
First Claim
Patent Images

1. A pressurizable elastic endoprosthesis anchoring apparatus freely insertable into a medullary canal and thereafter immovably anchorable thereto comprising:

  • an elongated load bearing stem;

    an elastic member mounted around and extending lengthwise of said stem; and

    means for compressing said elastic member radially outward into pressurized contact with the juxtaposed surface of the medullary canal after insertion therein;

    the elastic member being fluid impervious and having an internal cavity, and said means for compressing said elastic member including means for introducing a fluent medium under pressure into said cavity to expand said elastic member into pressurized contact with said surface of the medullary canal and to continuously maintain the elastic member compressed in resilient pressure contact with the medullary canal surface, said elastic member being effective to distribute elastic pressure substantially uniformly to the surface area of the medullary canal in contact therewith and to conform to irregularities present in the juxtaposed surface portion of the medullary canal, said uniformly distributed elastic pressure applied continuously by the elastic member to the medullary canal being effective to anchor said endoprosthesis immovably therein.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×